Malicious PDF — malware analysis report

Static analysis result for SHA-256 3537f0bf072a532f…

MALICIOUS

PDF

36.0 KB Created: 2021-05-23 07:13:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 280fcf16b70cf7afb96a069302f2ad8c SHA-1: e1f69465df4d7ed3956a8aaaee7de2003e70186e SHA-256: 3537f0bf072a532ffbbd07eef55e8a6299a938988bc96b918ac55904e494d20c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector for a "free generator / game hack" lure. The document body also contains a call to action to "CLICK HERE TO ACCESS TIKTOK GENERATOR". The presence of embedded URLs and the nature of the lure suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/835599320/tiktok-for-free-game-hack In PDF document text
    • http://petrorang.com/admin-panel/products/images/files/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31AA 26072 bytes
SHA-256: de24d9bfb12e98f6d91e9bda6fb9cea6a5581abb247e8815dd04771c9275e2e4
font_01_sfnt_off00006dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC4 17456 bytes
SHA-256: 59b82efa7141ba2b07d91e3b641cbf682cee4575ed292f5ecf89ba3b7e2e2e13

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